Stars of "Glee," "Private Practice" and "Chuck" will be in Park City on Saturday, March 30, for the second annual Park City Celebrity Smile Ski Challenge.It's a celebrity event to benefit Operation Smile, an international children's medical charity that has funded more than 200,000 life-altering surgeries for kids born with facial deformities.Scheduled to be on hand are "Glee" stars Lea Michele and Cory Monteith; "Private Practice" star Kate Walsh; and "Chuck" star Zachary Levi. They'll be joined by NBC Entertainment president Jennifer Salke; Fox Television chairman Dana Walden; and skiers Fuzz Fedderson, Holly Flanders and Kaylin Richardson.The Ski Challenge is set for 10 a.m.-noon on Saturday at the Canyons Resort in Park City, and will be followed by a luncheon and awards ceremony.For more information about Operation Smile, go to operationsmile.org.